My sister’s boyfriend (now ex) has been on my neck since we were young (I was about 16) at that time). They’d break up and make up even though I’d tell my sister her boyfriend was after me, they’d still settle.
I am 24 now. Now they’re exes and my sister is about to get married to another man and her ex came again to tell me it’s me he wants and the history between my him and my sister does not matter.